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Solar activity report
Report of Solar-Geophysical Activity 2026 Apr 26 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 116 Issued at 2200Z on 26 Apr 2026IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z Solar activity has been at moderate levels for the past 24
hours. There are currently 7 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(27 Apr, 28 Apr, 29 Apr).
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 527 km/s at 26/0848Z. Total IMF reached 14
nT at 26/0318Z. The maximum southward component of Bz reached -13 nT at
26/0318Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 572 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (27 Apr), quiet levels on day
two (28 Apr) and quiet to unsettled levels on day three (29 Apr).
Protons have a slight chance of crossing threshold on days one, two, and
three (27 Apr, 28 Apr, 29 Apr).
III. Event Probabilities 27 Apr to 29 Apr
| Class M | 55% | 55% | 55% |
| Class X | 15% | 15% | 15% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 26 Apr 156 Predicted 27 Apr-29 Apr 155/150/150 90 Day Mean 26 Apr 129
V. Geomagnetic A Indices
Observed Afr/Ap 25 Apr 007/009 Estimated Afr/Ap 26 Apr 012/016 Predicted Afr/Ap 27 Apr-29 Apr 010/012-006/006-007/010
VI. Geomagnetic Activity Probabilities 27 Apr to 29 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 10% | 15% |
| Minor storm | 05% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 20% |
| Minor storm | 35% | 20% | 20% |
| Major-severe storm | 35% | 10% | 20% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/04/24 | X2.5 |
| Last M-flare | 2026/05/22 | M2.3 |
| Last geomagnetic storm | 2026/05/16 | Kp6- (G2) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (2%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2026 | 79.3 -6.6 |
| May 2026 | 87.5 +8.2 |
| Last 30 days | 98 +7.5 |
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